"Twidell and Weir are masters of their subject and join the ranks of acomplished authors who have made a powerful contribution to the field. Renewable Energy Resources is a superb reference work."– Paul Gipe, www.wind-works.org

"It's ideal for student use – authoritative, compact and comprehensive, with plenty of references out to more detailed texts [...] a very valuable book."– Professor Dave Elliott of the Open University, UK, in Renew 162 2006

"What we need to combat climate change is a stream of students and graduates with the knowledge they can gain from this book [...] suitable not only for engineering students but also for policy-makers and all those concerned with energy and the environment."– Corin Millais (CEO Climate Institute)